* [Keyboard] Modernize the KMAC implementation
This brings the matrix implementation more in line with the current
default matrix code.
It also simplifies the implementation quite a bit.
* [Keyboard] Add layout support to KMAC
It's a little unclear what the style guidelines are for the QMK project.
But I figured that I should at least keep the indentation consistent
within the KMAC part.
Mathias Andersson
Drashna Jaelre
James Churchill